Hub Compatibility
Choosing the right hub is simple: first, identify your rear hub by checking axle size and cassette type (the most important part); and confirm details like spoke count and brake type.
Choose Your Rear Hub
The rear hub is the most important part of compatibility. You need to confirm two things: rear axle size and cassette type.
① Rear Axle Size
- 12×148 Boost Most modern MTB
- 12×142 Older MTB
- 135 QR Old quick-release bikes
- 157 Super Boost Enduro / DH
If you’re unsure: search your bike model + “rear axle spec”
② Cassette Type
- Shimano HG8–11 speed / some SRAM
- SRAM XDSRAM 11–12 speed (10T start)
- MicroSplineShimano 12 speed
Golden Rule: Match your current cassette, not your preference.
③ Spoke Holes
- 32H → Strong, most common
- 28H → Lighter, performance builds
Not sure?You can find out by counting the number of your spokes.
④ Brake Interface
- 6-Bolt → Most common
- Center Lock → Shimano systems
Match your rotor.
Choose Your Front Hub
Front hub selection is much simpler. There is no cassette or freehub choice here — just match your fork axle size.
① Front Axle Size
- 15×110 Boost Most modern MTB
- 15×100 Older bikes
- 20×110 Downhill only
If you’re unsure: search your bike model + “front axle spec”
② Spoke Holes
- 36H → Most Strong, more common
- 32H → Strong, most common
- 28H → Lighter, performance builds
Not sure?You can find out by counting the number of your spokes.
③ Brake Interface
- 6-Bolt → Most common
- Center Lock → Shimano systems
Match your rotor.
Still Not Sure?
Contact KOOVA with your bike model, cassette type, rear axle, and front axle details before ordering to confirm the correct hub setup.